diff --git a/study-rpc/pom.xml b/study-rpc/pom.xml
index 60f0723..cb2533a 100644
--- a/study-rpc/pom.xml
+++ b/study-rpc/pom.xml
@@ -15,7 +15,7 @@
         <dependency>
             <groupId>io.netty</groupId>
             <artifactId>netty-all</artifactId>
-            <version>4.0.36.Final</version>
+            <version>4.1.42.Final</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>